/var/log/spinifex is 0775 root:spinifex so each service user can write its own
log. logrotate refuses to rotate inside a group-writable directory unless the
config says which user to rotate as, so every entry was skipped and the logs
grew without bound.
Verified on env13: before, logrotate -d reported 'skipping
/var/log/spinifex/nats.log because parent directory has insecure permissions'
and nothing had ever rotated. After, the debug run is clean and forced
rotations produce nats.log.1 and a compressed nats.log.2.gz.
Josh Siviour